Bluetooth LE - 802.15.4 Mesh + BLE Multiprotocol Version 10.1.2 (February 18, 2026) - Release Notes#

Bluetooth LE Version 10.1.2

Simplicity SDK Version 2025.6.3

This document provides release information for the 802.15.4 Mesh + BLE Multiprotocol SDK.

Click here for earlier releases.

Release Summary#

Key Features | API Changes | Bug Fixes | Chip Enablement

Key Features#

Added in 10.1.2#

None.

Added in 10.1.1#

None.

Added in 10.1.0#

None.

Added in 10.0.0#

  • ZigbeeD, OTBR and BLE support on OpenWRT – GA.

  • Zigbee + BLE DMP support on EFR32xG29 - GA.

API Changes#

None.

Bug Fixes#

Fixed in 10.1.2#

Targeted quality improvements and bug fixes.

Fixed in 10.1.1#

Targeted quality improvements and bug fixes.

Fixed in 10.1.0#

Targeted quality improvements and bug fixes.

Fixed in 10.0.0#

  • Multipan RCP Improvements.

  • Zigbee-NCP + OpenThread-RCP Improvements.

  • Zigbee-BLE DMP Improvements.

  • Targeted quality improvements and bug fixes.

Chip Enablement#

None.

Key Features#

New Features | Enhancements | Removed Features | Deprecated Features

New Features#

Added in 10.1.2#

None.

Added in 10.1.1#

None.

Added in 10.1.0#

None.

Added in 10.0.0#

Add zigbeed option flag to point to zigbeed.conf

Enhancements#

Changed in 10.1.2#

None.

Changed in 10.1.1#

None.

Changed in 10.1.0#

None.

Changed in 10.0.0#

The RAIL 802.15.4 Multiplexer, 802.15.4 Unified radio scheduler priority and Spinel Host Interface - CPC components are now showing up under the 802.15.4 high-level category in Simplicity Studio.

Removed Features#

None.

Deprecated Features#

None.

API Changes#

New APIs | Modified APIs | Removed APIs | Deprecated APIs

New APIs#

None.

Modified APIs#

None.

Removed APIs#

Removed in 10.1.2#

None.

Removed in 10.1.1#

None.

Removed in 10.1.0#

None.

Removed in 10.0.0#

Removed API Name

Was Deprecated?

sl_sec_man_init

Yes

Deprecated APIs#

Removed in 10.1.2#

None.

Removed in 10.1.1#

None.

Removed in 10.1.0#

None.

Deprecated in 10.0.0#

Deprecated API Name

Planned Removal Date

sl_802154_radio_set_scheduler_priorities

2025 Dec

Bug Fixes#

Fixed in 10.1.2#

ID Issue Description GitHub / Salesforce Reference (if any) Affected Software Variants, Hardware, Modes, Host Interfaces
1570808, 1570809 Fixed an issue where with the presence of fast_channel_switching component, sl_rail_idle(), could turn off the radio on behalf of one stack, while there is a transmission still in progress from another stack. None. All RCP apps
1522329 Fixed an issue in the token end ID calculation logic for indexed tokens that was causing the end ID to be calculated incorrectly. This caused the key table to be prematurely reported as being full. None. All apps utilizing Zigbeed + RCP

Fixed in 10.1.1#

ID Issue Description GitHub / Salesforce Reference (if any) Affected Software Variants, Hardware, Modes, Host Interfaces
1503268 Fixed an issue where the Zigbee NCP + OpenThread RCP application examples would not boot up on certain Series-2 devices. None. Zigbee NCP + OpenThread RCP apps on Series-2 parts.

Fixed in 10.1.0#

ID Issue Description GitHub / Salesforce Reference (if any) Affected Software Variants, Hardware, Modes, Host Interfaces
1471746 Fixed an issue where the Zigbee + Bluetooth NCP application examples would not show in Simplicity Studio. None. Zigbee+BLE NCP apps

Fixed in 10.0.0#

ID Issue Description GitHub / Salesforce Reference (if any) Affected Software Variants, Hardware, Modes, Host Interfaces
1363050 Zigbee stack initialization no longer activates the radio (or RCP for host stacks) prior to stack APIs being called by the application. This prevents unwanted multi-PAN operation on Channel 11 (the default channel) when using a multi-PAN-capable RCP configuration. (Other ref: 1390725) SF: 00320314 All apps utilizing Zigbee
1366854 Fixed an issue where a CPC message from an RTOS-enabled RCP to host could be waiting in a send queue until something woke up the serial task. None. All RCP apps utilizing CPC
1375724 Fixed a race condition on the multipan RCP that resulted in a transmit complete message not being returned to the host, causing a 5 second pause in further transmissions prior to recovering. None. All RCP apps
1378298 Fixed an issue that caused a crash when entering keys print on an DMP Light app with LTO enabled. None. All SoC apps
1381165 Fixed an issue where disabling PTA on Zigbee-NCP + OT-RCP could cause NCP/RCP to reset. None. All CMP NCP+RCP apps
1393057 Fixed an issue where sample project generations for Zigbee-NCP + OpenThread-RCP (UART & SPI) and Zigbee-NCP + BLE-NCP (UART & SPI) were allowed on parts with insufficient RAM. SF: 00322443 CMP NCP+RCP and DMP ZB+BLE apps
1399687, 1426191 Fixed an issue where the Zigbee-BLE DMP Light app wouldn't go to EM2 sleep. SF: 00326199, 00326520 All DMP apps

Chip Enablement#

None.

Application Example Changes#

New Examples | Modified Examples | Removed Examples | Deprecated Examples

New Examples#

None.

Modified Examples#

Modified in 10.1.2#

Example Name Changes Supported Software Variants if applicable Supported Modes Supported OPNs / Boards / OPN Combinations Supported Host Interfaces

Zigbee - OpenThread Dynamic Multiprotocol Light SoC (z3-light_ot-ftd_soc).

 Removed board support for xG27 and xG29 family devices that are not supported for OpenThread. N/A SoC EFR32xG27 and EFR32xG29 boards removed. N/A

Modified in 10.1.1#

None.

Modified in 10.1.0#

None.

Modified in 10.0.0#

Example Name Changes Supported Software Variants if applicable Supported Modes Supported OPNs / Boards / OPN Combinations Supported Host Interfaces

Zigbee - BLE Dynamic Multiprotocol Light SED

See sample here

    The Zigbee BLE - DynamicMultiprotocolLightSed sample project can now be built for boards with only one LED if the LED1 component is excluded from the project.
 N/A N/A N/A N/A

Zigbeed

See sample here
    The Zigbeed sample application is now extended with the --conf parameter, so the location of the zigbeed.conf is now configurable and not being hardcoded to /usr/local/etc/zigbeed.conf
 N/A N/A N/A N/A

Removed Examples#

None.

Deprecated Examples#

None.

Known Issues and Limitations#

ID Issue or Limitation Description GitHub / Salesforce Reference (if any) Workaround (if any) Affected Software Variants, Hardware, Modes, Host Interfaces
1209958 The Zigbee + OpenThread + BLE RCP may stop working in endurance testing (~2 hours) on MG24 and MG21 devices with constant and concurrent traffic on all three stacks. None. None. Zigbee + OpenThread + BLE RCP app
1385052 Coex-enabled RCP may still occasionally transmit TX ACK after losing the Grant even when Acking is disabled and TX Abort is enabled. None. This will be fixed in future releases. Coex-enabled RCP
1385486 TX from coex-enabled RCP may infrequently happen without the request after turning on the non-802.15.4 compliant MAC Holdoff coex option. None. This will be fixed in future releases. Coex-enabled RCP
1457086 Coex-enabled EFR32MG24 RCP may sometimes output higher than expected grant denied counts in the PTA counters. None. This will be fixed in future releases. Coex-enabled RCP
1470207 Initializing a Bluetooth stack after attaching to a Thread partition will sometimes fail and return an error. This renders the Bluetooth interface inoperable, and further attempts to interact with the Bluetooth API may disrupt Thread networking capabilities. None. Initialize the Bluetooth stack before attaching to a Thread partition. SixG301 devices running OT+BLE DMP applications with link-time optimizations (LTO) enabled and the "bluetooth_start_on_demand" component included.
1514786 Wi-Fi coexistence on SixG301 is currently not supported.
Other references: 1514794, 1515385.		 None. This will be supported in future releases. SixG301 devices